Interlocking relay.



No. 879,885. PATENTED FEB. 25, 1908. E. MOGLINTGCK. INTERLOGKING RELAY.

APPLICATION FILED APR.30,1907.

PATENT oFFrca.

EDWARD McGLINTOCK, OF STQ'IAUL, MINNESQTA.

INTERLOCKING RELAY.

Specification of Letters Patent.

rammed Feb. as, mos.

Application filed April 30. 1907, Serial No. 371L051- To all whom it may concern:

Be it known that I, EDWARD McCLINTocK,

of'St. Paul, ltamscy county, Minnesota, have finvcnted certain new and useful Improvements in Interlocking Relays,-of which the following is a specification.

The object of my invention is to provide an interlocking relay for operating signals on a single track electric road.

My invention consists generally in providing a relay mechanism whereby the signal will be operated when the train is moving in one direction and will be silent or inoperative when the train is moving in opposite direction. v

In the accompanying drawings, forming part of this specification, Figure l is a diagrammatic view illustrating the normal position of the relay. Fig. 2 is a similar view illustrating the position assumed by the mechanism 11 on the entrance of a train into the block. ig. 3 is a diagrammatic view illustrating the relay when the train has passed out ofthc insulated section and entered the second or contiguous one. Fig. 4 illustrates the position of the relay when a train enters the block from the right and moving in the opposite direction from the trains illustrated in the previous figures.

In the drawing, A represents an insulated rail section and B tion separated from one another and the other rails on the same side of the track by These rail sections are on the sameside of the track to adaptthe d'esuitable insulation I.

vice for use on electric roads where the rails on one side are used for the return of the currents L is a conductor leading to a suitable signal indicated by S.

D represents a battery.

2 is a relayhaving an armature 3 connected with a similar armature 4 by a link 5.

6 is a second relay having a conductor 7 leading to the track rail 8 opposite the insulated section B, and a conductor 9 leads from the relay 6 to said section B, and said section B and the rail 8 are connected with the bat tery D. The relay 6 has an armature 10 and similar 'armatures 11 and 12 are provided, connected with the armature 10 by a bar 13. A conductor 14 connects the armature 10 with the armature 3 and a conductor 15 leads from the conductor 14 through the battery F to the insulated'rail. section A. A conductor lo'extends from each side of, the battery F a similar contiguous secand the relay 2. A contact point 17 isin path of the armature 3 and has a conductor 1 18 leading to the rail 8. A contact p01nt'j1j'9 is provided in the path of the armature 4 and f has a conductor 20 leading to .the ground G. I

A conductor 21 connects the armature 4 with;

the armature 11. A contact point 22 is in point 24 is in the path of the armature 11 and 18 connected with the conductor L leading to, the signal. A contact point 25 is in the path oi the armature 12 and has a conductor 26 leading to the insulated rail section B and .thc armature 12 is also connected with the conductor 15 by a conductor 27.

The circuit will normally be closed through the relay 2 by means of battery F and conductors 15 and 16, whereby the armature 3 will be attracted and the circuit opened at the points 17 and 19. The circuit through the relay 6 will also be closed by means of conductors 7 and 9, rail sulated rail section'B. The armature 10 will be thereby attracted and the circuit opened at the point 24 or the one connected with the signal line.

Referring now to Fig. 2 particularly, we

insulated section A coming from the left. The battery F will be instantly short circuited and the current instead of passing through the relay 2 will pass through conductor 14, armature 10, conductor 23, rail 8, truck of the locomotive and conductor 15 back to the battery. The relay 2 will be thereby denergized and its armatures will drop to the position indicated-in Fig. 2 and contact with the oints 17 and 19 whereupon the battery F will be short circuited through conductor 15, armature 3, conductor 18, track rail and the locomotive truck. Upon the passage of the truck to the track section B, batter D will be short circuited, the relay 6 denergized, and the armatures 10, 11 and 12 will drop, breaking the point of contact at 22and closing'the circuit at points 24 and 25. The circuit will now be closed through the signal con uctor L, contacts 19 and 24 and another path through insulated rail section B from the battery D, contact 25; conductors 27 and 15 through battery F, contact points 17 raiii 8', back to. battery D. Thus both relays aredeenergized while the truck is passing over rail'section B, As soon as the train the path of the armature 10 and has a con-f ductor 23 leading to the rail 8 and a contact will assume that a train has passed on to the:

8, battery D and inthe ground G. Contact 25 will provide will prevail as thiecircuit will be broken at 22 and the signal circuit will still remain open.

ground and the sign has passed on, cit the insulated rail sections,

the short circuits will be destroyed, the relays will. be energized again as'their circuits are reestablished and their armatures will be returned to their normal condition as indi cated in Fig 1.

We will assume now that a train is aproaching from the opposite direction or.

trom the right of the figure. As the forward wheels pass upon the railsection B, the bat- This condition will continue until all the trucks have passed off the insulated section B. As soon as this happens the relay 6 will be energized again attracting its armature and closing the circuit at point 22 and breaking it at point 24, and battery F will be short cirduited but without result as the signal circuit is broken at 24, consequently the signal will still be inoperative.

hen the trucks have passed entirely oil the rail section A, the relay 2 will return to its normal condition. It will thus happen that when a train is moving overthe track toward the right and, passes the relays, the

signal circuit will be closed and the signa operated, but Whena train passes over the same track in the opposite direction .the signal circuit will be opened andthe signal be inoperative.

' I. claim as m invention:

. 1. The combination, with a track ha'ving insulated rail sections and normally closed one direction and to allow said signal circuit to remain open when a train is moving over relay circuits, of a normally. open signal circuit and said relay circuits being arranged toclose said signal circuit when a train is moving over said insulated rail sections in said insulated rail sections in the opposite direction.

2. The combination, with the track; rails having in sulated rail sections A and and a batteryD in circuit with said section B and the" 'oppositerail, of .a rela having a'battery F in .circuitwith said at sections A, a second relay in-circuit'with said rail section B. and with the opposite rail, a contact-point having aground connection in the 'path of the armature of said first named relay, a second contact point in thepath of the armatureof said second named rela yy. a conductor contrack in the sagas necting said armatures, asig'nal circuit coiinected .with said secondscontact' point,

whereby when a truck p asses onto said insulated sections-from the left, "said relays will be denergized {and said 'signalcircuit closed through said contact points, substantially as described. 4

'3. The combination, with the .track rails having insulated railsections,.of a closed: circu t relay'connected with one of said rail sections, and deenergized upon the entrance. I

of a train upon said insulated tracksection, a second closed circuit rela-y connected with said second track section and denergized by thepassage of a truck on to said second insulated track section, a signal circuit normally open, and means whereby-.when said second relay is deenergized said. signal circuit will be closed tooperate the signal, sub- 'stantially as described.

4. The combination, with thetrack rails.

having insulatedrail sections A andB on the same side of the track, of a 'si nal circuit normally open havin a suitab e signal, relay circuits normallyc osed and sources of-elec trical energy therefor and said relaycircuits being arranged to be successively short circuited upon the passage of a tram over said rail sectionsmovmg 1n one direction to close said signal circuit andoperate said "signal and to jallow.said signal circuit to remain open whenatraln is moving over said in-' sulated rail sections in theopposite direction, substantially as describe 5. The combination, with the track rails.

having insulated rail sections, .of normally closed relay circuits arran ed to be short ci1' cuited upon the passage 0 a train'on to said insulated sections, a. normally open signal will be closed and the signal operated upon the short circuitin of said relay circuits and the denergizin 0 their relays when a train circuitarid means whereby said signal circuit passes over sai insulated rail sections movi-nglin one direction and'whereb' said signal wi remain open when said re ays are deenergized. by the passing over said sections of a train moving in the opposite direction.

' 6. The combination,

open signal circuit, and s id relay circuits being arranged to close said signal circuit-whena train is movin over said track in one direction and to a ow said signal circuit torernaln open when a train is movin over the opposite direction, su stantially asdescribedi T In witness whereof, 'I have-hereunto set my handthis 20th da ofA ril 1906. EDWA D 'CCLINTOOK.

Witnesses: p

RICHARD RAUL, J. B. ERA.

with a track having normally closed relay-ci ii it f anormauy I 

